ROOT::Minuit2::Quad12F Class Reference

Definition at line 17 of file Quad12F.h.

Public Member Functions
double	operator() (const std::vector< double > &par) const
	The meaning of the vector of parameters is of course defined by the user, who uses the values of those parameters to calculate their function Value. More...
double	Up () const
	Error definition of the function. More...
Public Member Functions inherited from ROOT::Minuit2::FCNBase
virtual	~FCNBase ()
virtual double	ErrorDef () const
	Error definition of the function. More...
virtual void	SetErrorDef (double)
	add interface to set dynamically a new error definition Re-implement this function if needed. More...
Public Member Functions inherited from ROOT::Minuit2::GenericFunction
virtual	~GenericFunction ()

#include </mnt/vdb/lsf/workspace/root-makedoc-v608/rootspi/rdoc/src/v6-08-00-patches/math/minuit2/test/MnTutorial/Quad12F.h>

Inheritance diagram for ROOT::Minuit2::Quad12F:

Member Function Documentation

double ROOT::Minuit2::Quad12F::operator() ( const std::vector< double > &  x ) const

inlinevirtual

The meaning of the vector of parameters is of course defined by the user, who uses the values of those parameters to calculate their function Value.

The order and the position of these parameters is strictly the one specified by the user when supplying the starting values for minimization. The starting values must be specified by the user, either via an std::vector<double> or the MnUserParameters supplied as input to the MINUIT minimizers such as VariableMetricMinimizer or MnMigrad. Later values are determined by MINUIT as it searches for the Minimum or performs whatever analysis is requested by the user.

Parameters

par	function parameters as defined by the user.

Returns

the Value of the function.

See also

MnUserParameters

VariableMetricMinimizer

MnMigrad

Implements ROOT::Minuit2::FCNBase.

Definition at line 21 of file Quad12F.h.

double ROOT::Minuit2::Quad12F::Up ( ) const

inlinevirtual

Error definition of the function.

MINUIT defines Parameter errors as the change in Parameter Value required to change the function Value by up. Normally, for chisquared fits it is 1, and for negative log likelihood, its Value is 0.5. If the user wants instead the 2-sigma errors for chisquared fits, it becomes 4, as Chi2(x+n*sigma) = Chi2(x) + n*n.

Implements ROOT::Minuit2::FCNBase.

Definition at line 40 of file Quad12F.h.

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The documentation for this class was generated from the following file:

• math/minuit2/test/MnTutorial/Quad12F.h